On Mon, 13 May 2024 08:47:50 GMT, Raffaello Giulietti <[email protected]>
wrote:
> All random number generator algorithms are implemented in module `java.base`.
> The usage of `ServiceLoader` in `j.u.r.RandomGeneratorFactory` is no longer
> needed.
src/java.base/share/classes/java/util/random/RandomGeneratorFactory.java line
190:
> 188: if (properties == null) { // double-checking idiom
> 189: RandomGeneratorProperties props =
> rgClass.getDeclaredAnnotation(RandomGeneratorProperties.class);
> 190: Objects.requireNonNull(props, rgClass + " missing
> annotation");
Hello Raffaello, with the `RandomGenerator` implementations now all residing
within the java.base module, I think an additional advantage of that is that,
it will now allow us to remove this internal `RandomGeneratorProperties`
annotation and thus this reflection code.
I think one way to do that would be something like this within this
`RandomGeneratorFactory` class itself:
private record RandomGenEntry(Class<?> randomGenClass, int i, int j,
int k, int equiDistribution, boolean stochastic,
boolean hardware) {
}
private static final Map<String, RandomGenEntry> FACTORY_MAP = ... // construct
the map
where the `FACTORY_MAP` will be keyed to the alogrithm and the value will be a
record which holds these additional details about the `RandomGenerator`.
This current PR is about getting rid of ServiceLoader usage. So if you want to
remove the usage of this annotation and reflection is a separate PR that's fine
with me. Furthermore, although I don't see the necessity of an annotation for
what we are doing here, if you think that the removal of the annotation and
reflection isn't worth doing, that is OK too.
-------------
PR Review Comment: https://git.openjdk.org/jdk/pull/19212#discussion_r1598417990
